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momentous

[moh-men-tuh s]
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adjective
  1. of great or far-reaching importance or consequence: a momentous day.

Origin of momentous

First recorded in 1645–55; moment + -ous
Related formsmo·men·tous·ly, adverbmo·men·tous·ness, nounun·mo·men·tous, adjectiveun·mo·men·tous·ly, adverbun·mo·men·tous·ness, noun

Synonyms

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vital, critical, crucial, serious. See heavy.

Antonyms

trivial, trifling.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for momentousness

Historical Examples

  • He seemed overwhelmed at the momentousness of the act which he was about to perform.

    The Man Who Rocked the Earth

    Arthur Train

  • Apart from the splendour of her social position and the momentousness of her political one, she was a person of great wealth.

    Queen Victoria

    Lytton Strachey

  • As I waited the coming of my most powerful customer, I could not keep my mind off the momentousness of the interview before me.

    Frenzied Finance

    Thomas W. Lawson

  • Yes, she had been blindly selfish, and had failed to realize the momentousness of the great questions of the day.

    The Liberty Girl

    Rena I. Halsey

  • Only the irrepressible Tubby was not duly impressed with the momentousness of the occasion.


British Dictionary definitions for momentousness

momentous

adjective
  1. of great significance
Derived Formsmomentously, adverbmomentousness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for momentousness

momentous

adj.

1650s, from moment + -ous to carry the sense of "important" while momentary kept the meaning "of an instant of time." Related: Momentously; momentousness.

Online Etymology Dictionary, © 2010 Douglas Harper

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